t.Errorf("did not expect float for %q", test.text)
		}
		if test.isComplex {
			if !n.IsComplex {
				t.Errorf("expected complex for %q", test.text)
			}
			if n.Complex128 != test.complex128 {
				t.Errorf("complex128 for %q should be %g Is %g", test.text, test.complex128, n.Complex128)
			}
		} else if n.IsComplex {
			t.Errorf("did not expect complex for %q", test.text)
		}
	}
}

type parseTest struct {

type BasicInfo int

// Properties of basic types.
const (
	IsBoolean BasicInfo = 1 << iota
	IsInteger
	IsUnsigned
	IsFloat
	IsComplex
	IsString
	IsUntyped

	IsOrdered   = IsInteger | IsFloat | IsString
	IsNumeric   = IsInteger | IsFloat | IsComplex
	IsConstType = IsBoolean | IsNumeric | IsString
)

// A Basic represents a basic type.
type Basic struct {
	kind BasicKind
	info BasicInfo

			if r != nil {
				*rounded = r
				return true
			}
		case UntypedFloat:
			return true
		default:
			panic("unreachable")
		}

	case isComplex(typ):
		x := constant.ToComplex(x)
		if x.Kind() != constant.Complex {
			return false
		}
		switch typ.kind {
		case Complex64:
			if rounded == nil {
				return fitsFloat32(constant.Real(x)) && fitsFloat32(constant.Imag(x))
			}

		panic("unreachable")
	}
	a := s.Sizeof(T) // may be 0 or negative
	// spec: "For a variable x of any type: unsafe.Alignof(x) is at least 1."
	if a < 1 {
		return 1
	}
	// complex{64,128} are aligned like [2]float{32,64}.
	if isComplex(T) {
		a /= 2
	}
	if a > s.MaxAlign {
		return s.MaxAlign
	}
	return a
}

func (s *gcSizes) Offsetsof(fields []*Var) []int64 {
	offsets := make([]int64, len(fields))

	}

	if !t.ChanDir().CanSend() {
		base.Errorf("invalid operation: %v (cannot close receive-only channel)", n)
		n.SetType(nil)
		return n
	}
	return n
}

// tcComplex typechecks an OCOMPLEX node.
func tcComplex(n *ir.BinaryExpr) ir.Node {
	l := Expr(n.X)
	r := Expr(n.Y)
	if l.Type() == nil || r.Type() == nil {
		n.SetType(nil)
		return n
	}
	l, r = defaultlit2(l, r, false)

				return true
			}
		}
	}

	// "V and T are both integer or floating point types"
	if isIntegerOrFloat(Vu) && isIntegerOrFloat(Tu) {
		return true
	}

	// "V and T are both complex types"
	if isComplex(Vu) && isComplex(Tu) {
		return true
	}

	// "V is an integer or a slice of bytes or runes and T is a string type"
	if (isInteger(Vu) || isBytesOrRunes(Vu)) && isString(Tu) {
		return true
	}

	{"complex", `_ = complex(1, 0)`, `invalid type`}, // constant
	{"complex", `var re float32; _ = complex(re, 1.0)`, `func(float32, float32) complex64`},
	{"complex", `var im float64; _ = complex(1, im)`, `func(float64, float64) complex128`},
	{"complex", `type F32 float32; var re, im F32; _ = complex(re, im)`, `func(p.F32, p.F32) complex64`},

				return false
			}
			return true
		}) {
			return
		}
		x.mode = novalue
		if check.recordTypes() {
			check.recordBuiltinType(call.Fun, makeSig(nil, x.typ))
		}

	case _Complex:
		// complex(x, y floatT) complexT
		y := args[1]

		// convert or check untyped arguments
		d := 0
		if isUntyped(x.typ) {
			d |= 1
		}
		if isUntyped(y.typ) {
			d |= 2
		}
		switch d {

	if x, ok := err.(*NumError); ok {
		x.Func = fnParseComplex
		x.Num = stringslite.Clone(s)
		if x.Err == ErrRange {
			return nil, x
		}
	}
	return err, nil
}

// ParseComplex converts the string s to a complex number
// with the precision specified by bitSize: 64 for complex64, or 128 for complex128.
// When bitSize=64, the result still has type complex128, but it will be
// convertible to complex64 without changing its value.
//

				return false
			}
			return true
		}) {
			return
		}
		x.mode = novalue
		if check.recordTypes() {
			check.recordBuiltinType(call.Fun, makeSig(nil, x.typ))
		}

	case _Complex:
		// complex(x, y floatT) complexT
		y := args[1]

		// convert or check untyped arguments
		d := 0
		if isUntyped(x.typ) {
			d |= 1
		}
		if isUntyped(y.typ) {
			d |= 2
		}
		switch d {